Merge pull request #545 from waltervh/develop

Core/Beam/Beam.cpp

Core/Multilayer/DecouplingApproximationStrategy.cpp

Core/Multilayer/DecouplingApproximationStrategy.h

Core/Multilayer/IInterferenceFunctionStrategy.cpp

Core/Multilayer/IInterferenceFunctionStrategy.h

Core/Multilayer/InterferenceFunctionUtils.cpp

Core/Multilayer/InterferenceFunctionUtils.h

Core/Multilayer/SSCAHelper.cpp

Core/Multilayer/SSCAHelper.h

Core/Multilayer/SSCApproximationStrategy.cpp

Core/Multilayer/SSCApproximationStrategy.h

Core/Parametrization/Units.h

auto/Wrap/doxygen_core.i